Subhepatic region (area under and between eye and anterolateral tooth) with a low straight ridge. Inner surface of sixth segment (propodus) of male claw (cheliped) hairy only distally, outer surface granular. Walking legs 1 and 2 (pereopod 2-3) with fifth and sixth segment (carpus and propodus) sharply ridged. Up to 2.5 cm wide.
Sponge crabs carry about with them a piece of living sponge, sea squirt, soft coral or shell that acts as its camouflage. The last legs end in tiny pincers which can only be seen when the sponge is taken off. Because they rely on camouflage and move very little to escape detection by predators, sponge crabs can be difficult to spot under rocks or among algae. Species of Stimdromia are unusual among crabs in that young crabs hatch from the eggs carried by the female and stay with the mother for several weeks. There is no planktonic larval stage.
Intertidal, to depths of 120 m.
Not harmful but a nip from large claws could be painful.
Native to Australia
- DSE Advisory List : Not listed
- EPBC Act 1999 : Not listed
- IUCN Red List : Not listed